add documentation

Author: ekraffmiller

src/templates/domain/useCases/UpdateTemplateMetadata.ts

@@ -8,7 +8,13 @@ export class UpdateTemplateMetadata implements UseCase<void> {
   constructor(templatesRepository: ITemplatesRepository) {
     this.templatesRepository = templatesRepository
   }
-
+  /**
+   * Updates the metadata for a template with the given identifier.
+   *
+   * @param {number} templateId - The unique identifier of the template to update.
+   * @param {UpdateTemplateMetadataDTO} payload - The metadata to apply to the template.
+   * @returns {Promise<void>} A promise that resolves when the metadata has been updated.
+   */
   async execute(
     templateId: number,
     payload: UpdateTemplateMetadataDTO,